Randstad Software Development Engineer Interview Questions and Answers

HackerRank sorting problem it will last for 30 min in the task

Q1. Abstract class and interface
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Q2. Oops concepts and
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Q1. What is event loop?
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Event loop is a mechanism in programming that allows for asynchronous execution of code by continuously checking for and handling events.
• Event loop is commonly used in JavaScript to handle asynchronous operations.

• It allows for non-blocking I/O operations by delegating tasks to the operating system.

• Event loop continuously checks the event queue for new events and processes them in a sequential manner.

• Example: In Node.js...read more
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Q2. What is hoisting?
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Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during the compilation phase.
• Hoisting applies to both variable and function declarations.

• Variable declarations are hoisted but not their initializations.

• Function declarations are fully hoisted, including their definitions.

• Hoisting can lead to unexpected behavior if not understood properly.
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Q1. 1. Strings,collections,exceptionhandling,multithreading 2.spring framework features and advantages,springsecurity,springAOP, 3.Springbootframework and features,Annotations,CRUDoperations,DataJPA, 4.RestWe...read more
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Q1. 1.personalInformation 2.why changing company 3.total projects and domains and clients that worked in our total experience 4.culture of your organization day to day activities 5.one critical situation or co...read more
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Q1. Tree graph DFS BFS and DS,
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Q2. Basic of progaramminggg
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Q1. Distance bw 2 nodes in binary tree
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To find the distance between two nodes in a binary tree, we can find the distance from the root to each node and then calculate the distance between the two nodes.
• Calculate the distance from the root to each node using a recursive function

• Find the lowest common ancestor of the two nodes

• Calculate the distance from each node to the lowest common ancestor and add them together to get the total distance
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Q2. Valid sudoku of 9*9
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A valid sudoku of 9*9 is a grid where each row, column, and 3x3 subgrid contains the numbers 1-9 without repetition.
• Each row must contain the numbers 1-9 without repetition

• Each column must contain the numbers 1-9 without repetition

• Each 3x3 subgrid must contain the numbers 1-9 without repetition
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